, bush, clinton and carter. president obama honored his legacy. >> delaware taught us the power of action and he taught us the power of ideas. the response of reason. and argument. the need to study not only those who you agree with but, also, those who you don't agree with. >> more than 90 countries flew in representatives from argentina to pakistan to trinidad to china. on the streets of south africa memorials large and paul for a man who triumphs over apartheid. >> we can try but we must celebrate the life of a great leader. >> after today's memorial, his body will lie in state if three days before it is buried in his childhood village on sunday. eric? >> thank you. >> 26 members of the pacific boy square are leaving for washington, dc to take part in a memorial service for nelson mandela. the embassy in south africa invited the choir to perform at the service at the washington national cathedral. they visited south africa in 2009. the group will sing a mix of traditional hymns of south africa and classical a